Power constant current source and application of multi-silicon switching tube

A technology of switching tube and constant current source, which is applied in the direction of conversion equipment without intermediate conversion to AC, can solve problems such as consumption of sample current, and achieve the effect of high withstand voltage value

Inactive Publication Date: 2012-02-22
杨云柳
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the power scale of the constant current source is only used in the integrated circuit. It is completed by the common mode circuit with the static load as the output, and the constant current is used as the input loop to control the constant output current, which consumes a part of the sample current, so it can only be used in small power IC sites

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  • Power constant current source and application of multi-silicon switching tube
  • Power constant current source and application of multi-silicon switching tube
  • Power constant current source and application of multi-silicon switching tube

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Embodiment Construction

[0014] Such as figure 1 Shown is the circuit diagram of the power constant current source in the model of the application of the present invention, in which the power supply passes through R 1 Provide paired transistor T 1 T 2 The base current of the diode D 1 D. 2 Separately control the two transistors T 1 T 2 In the positive half-wave and negative half-wave of the power supply, the saturation conduction is amplified in turn, so that the capacitor C 1 C 2 charge and discharge in turn, the output is determined by D 3 D. 4 Rectification, C 3 filter to provide fixed power to the load LED, R 2 It is the filter protection resistor of the load. Such as a certain period of time triode T 1 Turn on T 2 cut-off, 220v input U 1 Rectified by the bridge Q, the current is determined by T 1 to load to C 2 form an AC loop, C 2 charge, load with C 2 divide the voltage to obtain the divided voltage current, while C 1 via T 1 To discharge the load, the load obtains the d...

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Abstract

The invention relates to a power constant current source and application of a multi-silicon switching tube, is capable of being widely applied to the fields of LED (light-emitting diode) illumination, spot lighting, lead storage battery charging, a power supply of electrical appliance, a transistor relay and the like. The power constant current source utilizes voltage dividing of an energy storage capacitor to restrict current of a circuit loop, current of a load is limited by a given power in a step 1, the rest part of fixed energy is divided by a capacitor in a step 2 and is returned to an output load by virtue of a current doubling circuit, the load obtains a voltage dividing current and the returned doubled current, the rest part of the returned power is the part of input power which is not input the next time, power is decided by a capacitor no matter whether the load changes or not, variation is within maximum power range of the capacitor, namely the load obtains a relative constant current source, compared with alternating current output rectification, a polycrystal switching tube and a polycrystal oscillating tube, 50Hz direct current output is produced, and oscillating isolated output is produced, so as to adapt to requirements of different powers and different loads.

Description

technical field [0001] The invention relates to the application of a power constant current source and a polysilicon switch tube, and can be widely used in the fields of LED lighting, spotlight lighting, lead storage battery charging, electrical power supply, transistor relay and the like. Background technique [0002] At present, the power scale of the constant current source is only used in the integrated circuit. It is completed by the common mode circuit with the static load as the output, and the constant current is used as the input circuit to control the constant output current, which consumes a part of the sample current, so it can only be used in small Power IC places. Contents of the invention [0003] The purpose of the present invention is to overcome the drop voltage of some loads such as spotlights, the smooth voltage of the forward characteristics of LED lighting diodes, and the reverse electric field of battery charging to hide the load ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07
Inventor 杨云柳
Owner 杨云柳
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